Results 21 to 30 of about 6,765 (186)
Experimental study of R290 replacement R134a in cold storage air conditioning system
Case Studies in Thermal Engineering, 2022 R290 refrigerant offers good environmental protection and thermodynamic characteristics. The feasibility of R290 replacing R134a was summarized through theoretical analysis and experimental tests in this paper.
Huifan Zheng +5 more
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Experimental performance of R134a and R152a using microchannel condenser
Journal of Thermal Engineering, 2015 An experimental performance study on vapour compression refrigeration system with R134a and drop in substitute R152a with aluminium microchannel condenser was carried out for condensation temperature of 48°C while evaporation temperature varied from -10 ...
V. W. Bhatkar
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Scientific African, 2020 Refrigerants of low global warming potentials (GWPs) of ≤ 150 are required by regulations as working fluids in domestic refrigeration systems. Therefore, this study theoretically investigated the performance of five new refrigerant mixtures (R440A, R441A,
Bukola O. Bolaji
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Advances in Mechanical Engineering, 2019 Blend refrigerants combing hydrofluorocarbons and hydrocarbons are good substitutes to decrease the flammability of hydrocarbons while reducing the global warming potential of hydrofluorocarbons.
Liu Zhang +4 more
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Case Studies in Thermal Engineering, 2020 R134a, one of the most commonly used refrigerants especially for air conditioning (AC) systems, will be banned in automotive air conditioners after 2022 due to a high global warming potential (GWP).
Xinwen Chen +5 more
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Advances in Mechanical Engineering, 2016 In this article, R1234ze(E), R152a, and three mixtures M1, M2, and M3 composed of R152a and R1234ze(E) (in the ratio of 60:40, 50:50, and 40:60, by mass, respectively) as drop-in replacements of R134a in vapor compression system were theoretically ...
Zhaofeng Meng +3 more
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Energy Science & Engineering, 2021 This experimental study evaluates the energy performance and climatic changes of a cascade cooling system operating with the R134a/R744 pairs (cooling capacity of 4.5‐6 kW) and R438A/R744.
Marcus Vinícius Almeida Queiroz +6 more
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Speed of sound in liquid R134a
International Journal of Refrigeration, 1992 Abstract The speed of sound for liquid R134a (1,1,1,2-tetrafluoroethane) has been measured along isotherms at temperatures from close to the triplee point to above the critical temperature (180–380 K) at pressures from near saturation to 70 MPa. The measurements were made by using a pulse-echo-overlap technique at 3 MHz.
Henrique J.R Guedes, John A Zollweg
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European Mechanical ScienceThe increasing environmental disasters in recent years are caused by the release of artificial substances into the environment. The majority of artificial-containing emissions originate from petrochemical products.
Alpaslan Alkan
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Ain Shams Engineering Journal, 2018 Due to the European Communities motor vehicle directive (2006) refrigerants with a GWP higher than 150 are not allowed from January 1, 2017 in new passenger cars. Thus, a replacement for R134a is needed.
Gaurav, Raj Kumar
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